"Ambitious" is a pretty accurate description, especially when you consider how hard OEMs have pushed Microsoft over the issue even before Vista's launch. We've heard from OEMs that they have not been anxious to stop selling XP at a date predetermined by Microsoft, and they've told the software giant as much. Instead, they would like to see market demand drive decisions on when to stop selling Windows XP. If Microsoft is feeling pressure to make up for lost time from Vista's long development process by putting an end to sales of Windows XP, the OEMs want no part of it.